Total sales before an "end-period" about "actif programs"
Our need is below :
- #01 : identify all couple "program / type" actif in a period. Actif significated, having unless one sale in the year.
- #02 : for each couple "program / type" we have to sum all sales about this couple "program / type" before the end of the current period ( sales performed during the current year and during previous years)